// Copyright 2022-2023 Tigris Data, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package kv

import (
	"context"

	"github.com/apple/foundationdb/bindings/go/src/fdb"
)

type Future = fdb.FutureByteSlice

type baseKeyValue struct {
	Key    Key
	FDBKey []byte
	Value  []byte
}

type baseKV interface {
	Insert(ctx context.Context, table []byte, key Key, data []byte) error
	Replace(ctx context.Context, table []byte, key Key, data []byte, isUpdate bool) error
	Delete(ctx context.Context, table []byte, key Key) error
	Read(ctx context.Context, table []byte, key Key, isSnapshot bool, reverse bool) (baseIterator, error)
	ReadRange(ctx context.Context, table []byte, lkey Key, rkey Key, isSnapshot bool, reverse bool) (baseIterator, error)
	SetVersionstampedKey(_ context.Context, key []byte, value []byte) error
	SetVersionstampedValue(ctx context.Context, key []byte, value []byte) error
	Get(ctx context.Context, key []byte, isSnapshot bool) Future
	AtomicAdd(ctx context.Context, table []byte, key Key, value int64) error
	AtomicRead(ctx context.Context, table []byte, key Key) (int64, error)
	AtomicReadRange(ctx context.Context, table []byte, lkey Key, rkey Key, isSnapshot bool) (AtomicIterator, error)
}

type baseIterator interface {
	Next(*baseKeyValue) bool
	Err() error
}

type baseTx interface {
	baseKV
	Commit(context.Context) error
	Rollback(context.Context) error
	IsRetriable() bool
}

type baseKVStore interface {
	baseKV
	BeginTx(ctx context.Context) (baseTx, error)
	CreateTable(ctx context.Context, name []byte) error
	DropTable(ctx context.Context, name []byte) error
	TableSize(ctx context.Context, name []byte) (int64, error)
}
